Thank you for your query.
We would have appreciate if you had mentioned your son's age. If all the investigations are normal and presuming that his cold
has become alright then on what basis have the doctors said that it is a viral infection and why is he getting dehydrated? If you can throw more light on these issues it shall facilitate us to give you some guidance.
Presuming that your son is a school going child it would be appropriate to discuss the issue with his teachers and even the school counsellor. At times some interpersonal issues with peers can create problems and the child may complain of headaches
I hope I have answered your query to your satisfaction.
Wishing your son an early recovery.
Rajiv K Khandelwal